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Comment on "Past of a quantum particle revisited"

Quantum Physics 2019-03-06 v1

Abstract

The recent criticism of Vaidman's propsal for the analysis of the past of a particle in the nested interferometer is refuted. It is shown that the definition of the past of the particle adopted by Englert et al. [Phys. Rev. A 96, 022126 (2017)] is applicable only to a tiny fraction of photons in the interferometer which indeed exhibit different behaviour. Their proof that all pre- and postselected particles behave this way, i.e. follow a continuous trajectory, does not hold, because it relies on the assumption that it is intended to prove.

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Cite

@article{arxiv.1805.12171,
  title  = {Comment on "Past of a quantum particle revisited"},
  author = {Uri Peleg and Lev Vaidman},
  journal= {arXiv preprint arXiv:1805.12171},
  year   = {2019}
}

Comments

Comment on quant-ph 1704.03722